A video posted on YouTube has been linked to the massacre at a Finnish school, in which seven have been reported killed.

The YouTube video, set to hard-driving music, shows a still photo of a school that appears to be Jokela High School.

The photo then fragments to reveal a red-tinted picture of a man pointing a gun at the camera.

This is believed to be the first school shooting in Finland's history.

Jarkko Sipila, a reporter with MTV, told CNN that the shooting happened around noon Finnish time (10:00 GMT) in the quiet town around 50 kilometers (30 miles) north of Helsinki.

Sipila said some of the pupils had fled to a nearby elementary school while police surrounded and sealed off the high school. Finnish news agency STT carried police comments that they had been fired at.

The Associated Press reported comments from Kim Kiuru, one of the school's teachers, on radio station YLE.

Kiuru described how the headmistress used the public address system around noon to tell pupils to stay in classrooms.

He said he locked his classroom door, then waited in the corridor for more news. "After that I saw the gunman running with what appeared to be a small-caliber handgun in his hand through the doors towards me, after which I escaped to the corridor downstairs and ran in the opposite direction, " Kiuru said.

The agency reported Kiuru as saying that he saw a woman's body as he fled the school, before telling his pupils to leave the building through the windows.

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